2) Once the chocolate is firm, preheat the oven to 180 C / Gas Mark 4.
3) Place the sugar in an empty pie dish. Roll the chocolate into teaspoon-sized balls and set aside. Roll a walnut-sized ball of cookie dough into a thin log about 7.5cm long. Place a chocolate ball on a work surface and wrap a cookie dough log around the chocolate ball and press to adhere. It should look like a cookie version of the planet Saturn. Roll the cookie in the sugar to coat. Place the cookie on a large baking sheet and continue forming
4) The remaining cookies and rolling them in sugar. Once all the cookie balls are on the baking sheets, use the bottom of a drinking glass to flatten the cookies to about 5mm thick.
5) Bake the cookies for 15 minutes. Transfer the cookies to a wire rack to cool, then serve.